Smoke-preventer.



O. G. WARNKE.

SMOKE PREVENTER.

APPLICATION rum) MAY 1, 1908.

1,048,245, Patented Dec. 24, 1912.

2 SHEETS-SHEET 1. \v

ATTI Zit portion in a horizontal direction.

UNTTE OSCAR G. WARNKE, OF CLEVELAND, OHIO.

SMOKE-PREVENTER.

To all whom it may concern:

Be it known that I, OsoAn Gr. 'WARNKE, a citizen of the United States,residing Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Smokedrcventers, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings.

My invention relates to furnaces and more especially has in view theprovision and equipment of a furnace wherein nearly complete combustionof the fuel is obtained, so that the smoke and combustible gases arisingfrom the fuel after a charge of coal has been put in the furnace will becompletely burned, thereby preventing the emission of smoke from thestack and securing the maximum heat energy from the fuel.

More specifically, my invention comprises a very eflicient device whichwill automatically feed into the furnace above the tire bed a quantityof steam and air for a predetermined time, whenever the stoking doorsare opened, to fire the furnace and moreover to maintain the supply ofair and steam unabated during such time and to quickly and completelycut off the supply at the end of the time.

Generally speaking, the invention comprises the elements andcombinations thereof herein illustrated and set forth in theaccompanying claims.

Reference should be had to the accompanying drawings, which form a partof the specification.

Figure 1 is a front elevation of a portion of the furnace showing mydevice mounted thereon; Fig. 2 is a sectional plan through the frontwall and a portion of the side walls of the furnace; Fig. 3 is a sideelevation of the furnace, the side wall being removed; Fig. 4 is anelevation of the detent mechanism used with my device; Fig. 5 asectional elevation of the injector nozzle.

The front wall of the furnace is represented at 1 and the side walls at2 and 3 respectively. The front wall is formed with a series of portsextending therethrough designated at 4, which ports flare at their inner()n the outer side of the front wall is an iron plate 5, which carriesthe customary ash doors 6 and stoking doors 7. There are holes throughthe iron plate 5 which aline with Specification of Letters Patent.

Application filed May 1, 1908.

Patented Dec. 24:, 1912.

Serial No. 430,277.

the openings 4: through the front wall of the furnace.

Steam injectors, generally represented at 8, project through theopenings 4 in the front wall of the furnace and extend to the endthereof. These injectors extend beyond the plate 5 and at their outerportions are connected with a pipe 9 which runs parallel to and in frontof the furnace. This pipe 9 is connected at one end with a vertical pipe10, which pipe is connected with a source of steam supply. There is avalve 11 in the pipe 10 which opens and closes communication of thesteam pipe 10 with the pipe 9, and this valve is operated in a mannerhereinafter described. The injectors comprise an outer nozzle having arestricted outlet portion and an inner nozzle or tube also.

formed with a restricted outlet portion, the inner nozzle being of lesslength than its surrounding nozzle, and being connected with the steampipe 9 by means of a connector 18, while the space surrounding thisnozzle and inclosed by the outer nozzle is in communication with theatmosphere at such periods of time as steam is admitted through theinner nozzle.

The body of the injector shown in Fig. 5 comprises a T formed with arms12, 13, and 1 1, and a nozzle 15 secured within the arm 12 by means of ascrew-threaded engagement. This nozzle is restricted at its outerportion as indicated at 16. The arm 13 of the T supports a bushing 17which is screw-threaded thereto and is provided with a central openingwhich has screw-threaded engagement with a pipe 18, the said pipe 18projecting through the bushing 17. The pipe 18 is screw-threaded at itsinner portion and has mounted thereon a union or cap 19, which cap isformed with a central opening screw-threaded to engage with a nozzle 20which is restricted at its outer portion as indicated at 21. The arm 1 1of the T has seated at its outer portion a spider 22, the outer part ofwhich is shown as screwthreadcd to engage with the screw-threaded wallsupon the arm 14:. The spider is formed with a central boss 23 which isconnected by means of arms 24 with the outer portion of the spider. Thecentral boss 23 has an opening through which projects a rod or post 25,my means of which, the valve cap is always correctly guided to its seat.Mounted upon the post 25 is a cap 26 which is adapted to be seated uponthe top portion of the arm 14 so as to close the communication of thisarm with the atmosphere. The cap 26 is adapted to be lifted at certainperiods in a manner which will be hereinafter described. 7 p

A shaft 27 is mounted upon the plate 5 above the doors and is secured tothe said plate by means of straps 28, which straps have suitablebearings formed upon them to accommodate the said shaft. At one end theshaft has an arm 29 rigidly secured thereto, which arm has a pivotedconnection with another arm 30 that is secured to the valve stem of thevalve 11. It will therefore be apparent that when the shaft 27 isrotated the valve stem will be turned in a direction to either open orclose the valve 11 according to the direction of rotation of the shaft27. The shaft 27 also has rigidly secured thereto a series of arms 30having a pivotal connection with links 31, which latter are hinged tothe caps 26 upon the injector nozzles, as indicated at- 32. The shaft 27at the end opposite to the end carrying the lever 29 has rigidly securedthereto an arm 33, which arm has pivotal connection with a vertical rod34. This rod at its opposite end has connection with a dash pot pistoncontained within the dash-pot cylinder 35.

The dash-pot is of ordinary construction, permitting the rod 34 to bedrawn upward very readily but causing the motion of the rod 34 in adownward direction to be very much slower. The rod 34 at a pointslightly above the dash-pot cylinder 35 has a collar 36 secured theretoupon which collar are adapted to be placed weights 37, these weightsbeing varied according to the rapidity with which it is desired to causethe rod 34 to descend. This rod 34 is connected with chains 38, whichchains are connected to the stoking doors 7 passing over pulleys 39which are mounted upon the front plate 5 and are suitably arranged tosupport the said chains. In proximity to the doors are arms 40, whicharms are pivotally supported upon the hinge pintles 41 of the stokingdoors. These arms 40 are provided with downwardly projecting lugs 42which stand in the path of travel of the doors 7 when they are opened.

It will be apparent from the construction which I have described abovethat as the doors 7 are swung open they will engage with the lugs 42,thereby swinging the arms 40 and causing the chains 38 to pull the rod34 in an upward direction, which rod, by virtue of its connection withthe shaft 27, will cause the shaft to rotate in a direction to elevatethe links 31, thereby raising the covers 26 which are upon the injectorsand allowing the ready admission of air to the interior of the latter.At the same time,

the valve 11 in the pipe 10 will be opened, whereby steam will beadmitted to the pipe 9, thence through the pipes 18 and into the innernozzles 20 of the injectors. The steam will then pass through therestricted portion 16 of the outer nozzle, entraining air as it passes,which air and steam will be carried through the outer nozzle 16 and intothe fire-box above the bed of coals.

To cause the continuance of the supply of the steam and air to thefire-box for some appreciable period after the coal has been added, adash-pot is employed retarding the rotation of the shaft 27 to itsnormal position for some time after the closing of the doors. Therapidity with which the valves in the injector nozzles and in the steampipe 10 will be closed is dependent upon the amount of weight 37employed, which affects the rate of travel of the dashpot piston withinthe dash-pot 35.

It is very desirable that the supply of air and steam be maintainedunabated in force and quantity for a period sufficient to completelyburn the volatile products given from the coal whenever fresh coal isadded, if the best results are to be obtained. It has been proposedheretofore to use a dash-pot suitably connected to the air and steamvalves so that the said valves will be slowly closed, but in such aconstruction the pressure of the steam and air becomes comparativelylight, as the valves near their closed position, and this is verydetrimental, because it will interfere with the regular draft of thefurnace. The maximum efliciency is obtained, when, as stated above, theforce of air and steam is supplied for the given time unabated, and atthe completion of the time is quickly and completely shut off. I

have secured this result by the following construction.

Upon the shaft 27 is rigidly secured a collar 43, which collar is formedwith a notch 44 in its periphery. A lever 45 is pivotally mounted uponone of the straps 28 and is in such position relative to the collar 23that one end of the lever may engage in the notch 44 at certain times.means of a spring 46, which is secured to the plate 5, always held in aposition tending to engage with the notch 44. When the valve in thesteam pipe 10 and the valves in the injector nozzles are closed, theposition of the collar 43 is such that the notch is below the lever 45and out of engagement therewith. However, when the shaft 27 is rotatedto open the aforesaid valves, the collar 43 will be rotated and thelever 45 will, by virtue of the spring 46, be brought into engagementwith the said notch, which engagement will hold the shaft 27 in aposition to keep the valve in the steam pipe and the valves in theinjector nozzles open. At its outer end, the lever 45 is formed. withThis lever 45 is by a slot 47 through which projects a rod 48. This rodmay freely slide through the slot 47, and at its outer end the rod isprovided with a nut 49 and at the lower portion the rod is rigidlyconnected to the rod 34, as shown in Fig. 1.

It will be apparent from the foregoing description that as the rod 34 israised, the rod 48 will be raised therewith and will freely slidethrough the slot 47 in the lever 45, thus permitting the lever 45 toengage with the notch 44 in the collar 43 as soon as the shaft 27 isrotated to a position to maintain the valve 11 and valves 26 in openposition, in which position the shaft 27 will be held. However, when therod 31 descends, the rod 48 will likewise descend and at a given timethe nut 49 coming in contact with the arm of the lever 45 will releasethe said lever from its engagement with the notch in the collar 43, sothat the shaft 27 will rotate (due to the Weight of the parts carried bythe rock arms on this shaft) and close the valve in the steam pipe andthe valves in the injector nozzles. It will be seen that by regulationof the position of the nut upon the rod 48, the closing of the valvesaforesaid may be regulated to take place at any time desired during thedescent of the rod 34.

I have provided means for supplying air to the combustion chamberadditional to the device which I have heretofore described and by virtueof this auxiliary air supplying means I am enabled to supply air to thecombustion chamber at any time it may be desirable. Longitudinalchannels are formed in the side and front walls, which channels areformed at right angles to each other and intersect, the channel in theside wall being continued so that it opens through the outer portion ofthe front wall. These channels communicate with distributing heads orports 52 and 50 within the side and front walls respectively, whichports are located above the grate and will ordinarily be above the bedof coals upon the grate.

Located in the channels are pipes 50 and 51 which are connected by meansof a T as indicated at 54 and at the end of said pipes are elbows 50 and51 which are enlarged somewhat, which elbows project through the innerportions of the ports 53. The outer end of the pipe 50 is closed bymeans of a damper plate 55.

The construction just described is duplicated upon the other side wallof the furnace, so that the above description will suffice for and applyto both sides.

Vhen either or both of the chamber plates 55 are raised, air will beadmitted through the pipes and due to the draft within the furnace theair will be carried into the combustion chamber. It is thus obvious thatI have provided an auxiliary means for admitting the air, whereby alarge quantity of air may be admitted at such times as coal is suppliedto the furnace or at any other time when it is desired to supply moreair to the combustion chamber.

The damper plates 55 are connected to the shaft 27 by means of chains 56so that as the said shaft is rotated, the plates will be lifted andadmit air at the same time that the injectors are operated. Owing to thefact that a flexible connection is used between the plates and the shaft27, it will be possible to open the plates at any time at which it maybe desirable without operating the injectors.

It will be apparent that whenever the stoking doors are opened to firethe furnace the mechanism for feeding the air and steam will be put inoperation, thus doing away with the personal equation which is presentin so many devices, which requires some attention from the operator toset the air and steam feeding mechanism in operation, or to stop itsaction. It will also be apparent that by the removal 'of the arms 40from their mounting upon the pintles 41 the doors may be opened withoutoperating the air and steam injectors.

I claim:

1. The combination with a furnace having a combustion chamber, of meansfor supplying air and steam to the combustion chamber, valves forcontrolling said supplv and an oscillating shaft having connections withthe valves, means for rotating the shaft in one direction to open thevalves, a detent engaging a shaft to hold the shaft in such position anda rod moving in one direction so as to allow the detent to engage theshaft whereby the valves will be held open, said rod moving slowly inthe opposite direction to engage the detent to release the shaft wherebythe valves are closed.

2. The combination with a furnace having a combustion chamber, of meansfor supplying air and steam to the combustion chamber, valves forcontrolling said supply, and an oscillating shaft having connectionswith the valves, means for rotating the shaft in one direction to openthe valves, a detent engaging the shaft to hold the shaft in suchposition, a dash pot comprising a casing and a piston therein, a rodoperated by the piston, the rod moving to allow the detent to engage theshaft when the said shaftis rotated to open the valves and said rodslowly moving in the opposite direction to engage the detent to releasethe shaft from its engagement therewith whereby the valves will beclosed.

3. The combination with a furnace having a combustion chamber, of meansfor supplying air and steam to the combustion chamber, valves forcontrolling said supply, and

an oscillating shaft having connections with the valves, means forrotating the shaft in one direction to open the valves, a detentengaging the shaft to hold the shaft in such position, a dash-potcomprising a casing and piston therein, a rod carried by said piston andcoupled with the said shaft, a second rod carried by the first rod andmovable therewith, means for moving the first mentioned rod to rotatethe shaft whereby the valves are opened, the second rod releasing thedetent during such operation, means upon the second rod for engaging thedetent upon its return movement to release the shaft from its engagementtherewith, whereby the valves will be closed.

4. The combination with a furnace having a combustion chamber therein,means for supplying air and steam to the combustion chamber, valves forcontrolling the supply of the air and steam, an oscillating shaft,connections between said shaft and valves, a dash-pot comprising apiston and a casing, a rod mounted upon said piston and engaging withthe said shaft to rock the same, and connections between the said rodand stoking doors, whereby when the doors are opened, the rod will beraised and the shaft rotated, and means for causing the rod to return toits original position, a second rod mounted upon the first rod so as tomove therewith, a detent engaging the oscillating shaft to hold theshaft from movement when the valves are opened, means upon the secondrod for engaging the detent during its return movement, whereby theoscillating shaft will be disengaged and the valve closed.

5. A furnace formed with a combustion chamber having inclosing walls,channels in the side walls, said channels having an opening upontheexterior of the front wall, other channels in the front wallcommunicating with the aforesaid channels, ports in the side and frontwalls with which the said channels communicate, cover plates for closingthe channel openings through the front wall, valved connections forsupplying a fluid to the combustion chamber, a shaft for operating thevalves simultaneously and connections between the shaft and cover plateswhereby they will be opened when the shaft is operated.

In testimony whereof, I hereunto afiiX my signature in the presence oftwo witnesses.

OSCAR Gr. WARNKE.

Witnesses:

A. J. HUDsoN, BRENNAN B. WEST.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

